|Classification and external resources|
Craniodiaphyseal dysplasia (also known as CDD or lionitis) is an extremely rare autosomal recessive bone disorder that causes calcium to build up in the skull, disfiguring the facial features and reducing life expectancy.
The underlying genetics are uncertain.
Among the medical signs are dacryocystitis, seizures, intellectual disability, and paralysis, each of which is a complication resulting from the diminutive foramina. A common sign reported as a result of the disease has been a difference of the size of the eyes.
The main character of the two-issue comic book miniseries Friday the 13th: How I Spent My Summer Vacation by Wildstorm is a 13-year old boy suffering from the disorder (with its effects and name being stated).